Re: for_each_online_cpu broken ?

Dave Jones
2005-12-08T06:28:53Z

On Thu, Dec 08, 2005 at 04:22:05PM +1000, Nigel Cunningham wrote:

> > Yep, I noticed it offers a maximum of 6 cpus on my way.
> > As a sidenote, seems kinda funny (and wasteful maybe?), doing this
> > on a lot of hardware that isn't hotplug capable. (Whilst I could
> > disable cpu hotplug in my local build, this isn't an answer for
> > a generic distro kernel).
>
> Both suspend to disk (and suspend to ram?) implementations now depend on
> hotplug_cpu to enable extra cpus, so there is at least one reason for
> them to want hotplug support in a generic kernel.

You mean suspend -> plug in a new cpu -> resume transitions ?
That sounds *terrifying*.

Dave